I have had LGB point motors on aristocraft points for two years now with ne'er a problem. My only additional comment would be about the manual switches which is, that in my experience, the Aristocraft ones are stronger and better than the LGB ones.
I might add, which has been commented on before, probably in GSM, is the problem/slight hiccup with the larger plastic frog on Aristocraft which causes occasional hesitation to my shorter 0-4-0 engines.